Jack



' 1,638,859 Aug 16 1927- w. L. KNowLEs JACK Filed Deo. 2l. 1925 PatentedAug. 16, 1927.

UNITED -STATES WILLIAM L. KNQWLES, OF FOSTORIA, OHIO.

JACK.

.Application led December 21, 1925. Serial No. 76,755.

This invention relates to an improved jack particularly designedfor usein connection with motor vehicles and seeks, among other objects, toprovide a jack which may be positioned beneath either the front or rearaxle of an automobile without the necessity of kneeling or reaching orcrawling under the vehicle.

The invention seeks. as a further object, to provide a jack which may beshoved under the vehicle and o erated for raising one of the wheelsthereo without the necessity of touching any art of the vehicle so thatin order to use t e jack, the operator need not' soil his hands orclothing.

Still another object of the invention is to provide a jack wherein thelevers employed will be so constructed and arranged that but littleeffort will be required for operating the jack to lift the vehicle.

And the invention seeks, as a still. further object, to provide a ackwhich will be simple and sturdy in its construction and which may beproduced at moderate cost.

Other objects of the invention not specifically mentioned in theforegoing will appear during the course of the following description.

In the accompanying drawings:

Figure 1 is a perspective view showing my improved jack arranged beneathoneof the rear springs of a conventional motor vehicle and operated tolift the adjacent rear wheel of the vehicle.

Figure 2 is a sectional view on the line 2-2 of Figure 1, looking in thedirection indicated by the arrows.

Figure 3 is a detail elevation of the head block of the jack andassociated parts.

Figure 4 is a sectional view on the line 4 4 of Figure 3, looking in thedirection indicated by the arrows.

In carrying the invention into effect, I employ an oblong head or block10, and projecting from the side edges of said head are trunnions 11.Swingingly mounted at corresponding ends thereof upon said trunnionsisla pair of lifting bars 12, one of which is bent downwardly at itsfree end and provided with a foot plate 13 while the other of said barsis bent upwardly at its free end and provided with a saddle 14.

Journaled through the head 10 is a shaft 15 having a squared rearterminal 16 to removably receive a crank 17, and fitting the shaft tocoact with the rear side of the head is an appropriate thrust bearing 18secured by a nut 19 screwed on the rear end portion of the shaft.Journaled through the head .10 above the shaft 15 is a stub shaft 2Ohaving a squared terminal 21 for removably receiving the crank 17 andfixed on said shaft is a stop collar 22 confronting the rear side of thehead. Fixed to the forward end of said shaft is a pinion 23 and meshingwith said pinion is a gear 21 fixed on the shaft 15. nclosing said gearand pinion is a vcover 25 secured to the edges of the head 10 bv capscrews 26, the cover being aperture to freely receive the shaft 15therethrough. Preferably,`the cover is of suitable sheet metal.

Fitting over the forward end of the shaft 15 is a sleeve 27, and rigidlyconnecting the sleeve with the shaft is a taper pin 28. Appropriatelyfixed inthe forward end of the sleeve is a nut 29, and screwed throughthe nut is an adjusting rod 30 having a flattened forward terminal 31.Pivotally connected to the forward end portions of the bars 12 near theangles therein, are longitudinally curved toggle links 32 overlying theforward terminal 31 of the rod 30 at opposite sides thereof. andivotally connecting the inner ends of said inks with said terminal is abolt 33, the links being preferably provided with spaced openings 34 toVselectively accommodate said bolt so that the effective lengths of thelinks may be varied.

As will now be seen in view of the foregoing, by applying the crank 17to the terminal 16 of the shaft 15 and rotating the crank in acounter-clockwise direction, the adjusting rod 30 may be shiftedforwardly for swingingthe inner ends 0f the links 32 forwardly andcollapsing the jack when, by grasping the head 10, the bars 12 of thejack may be shoved beneath a vehicle, as suggested in Figure 1, andpositioned for engagement with the desired part of the vehicle such asthe axle or spring. By then turning the crank 17 in the oppositedirection, the rod 30 will be shifted rearwardly for rocking the togglelinks and swinging the uppermost of the bars 12 upwardly to engage thesaddle 14 with the vehicle, when continued rotation of the crank 17will, as will be perceived. serve to effect the lifting of the adjacentwheel of the vehicle. Should it be found diflicult to raise the vehicleby turning the shaft 15 directly by means of the crank 17, said crankmay be applied to miy the terminal 21 of the shaft 20 when, upon theoperation of the crank, power will be applied to the shaft 15 throughthe gears 23 and 24 with resultant easy operation of the crank, due tothe ratio of the gears. As will be perceived, the jack is of such lengththat the jack may be readily positioned tbeneath the vehicle without thenecessity of kneeling or crawling under the vehicle and may likewise beoperated for lifting any one of the wheels of the vehicle withoutthenecessity for reaching under the vehicle or touching the vehicle, theoperator beingpermitted to maintain nearly an upright posi- ,t

tion.

Having thus described the invention. what I claim' is:

1. A lifting jack comprising bars ivotedv at one end and having oppositeen s bent laterally in opposite directions, toggle links connecting thelaterally bent ends of the bars, a member pivoted at one end to thetoggle links, and an auxiliary member rotatably mounted in the pivotconnection of the said bars and having screw thread connection with theopposite end of the first mentioned member.

2. A lifting jack including ahead, coacting lifting bars pivotedthereon, one of said bars being provided with a foot and the otherv ofsaid bars being provided with a saddle, toggle links pivotally connectednear their outer ends to said bars, a rod pivotally connected to theinner end portions of said links, and a shaft rotatable 3. A liftingjack comprising a head provided with trunnions at opposite sides, barsmounted at one end on the trunnions and having their opposite ends bentlaterally in opposite directions toggle links connecting the laterallybent ends of the bars, a rod pivoted at one end to the toggle links, ashaft mounted in the head, 4a member coupled to the shaft and havinscrew thread connection with the other en of the said rod, and a secondshaft mounted in the head and geared to the first mentioned shaft toadmit of power being applied directly or indirectly thereto as required.

In testimony whereof I aix m signature. WILLIAM L. KNOWLES.1 [L s.]

